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Finding the Third Proportional to 51.26 and 77.84

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Solution

The third proportional to 51.26 and 77.84 is: 118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.26 : 77.84 = 77.84 : x
  2. Step 2: Convert to fraction form
    51.26/77.84 = 77.84/x
  3. Step 3: Cross multiply
    51.26x = 77.84 × 77.84
  4. Step 4: Simplify right side
    51.26x = 6,058.43
  5. Step 5: Solve for x
    x = 6,058.43/51.26
  6. Step 6: Final answer
    x = 118.20

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.